781 lines
20 KiB
C
781 lines
20 KiB
C
/*
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* QEMU OSS audio driver
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*
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* Copyright (c) 2003-2005 Vassili Karpov (malc)
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#ifdef __OpenBSD__
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#include <soundcard.h>
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#else
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#include <sys/soundcard.h>
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#endif
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#include "qemu-common.h"
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#include "audio.h"
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#define AUDIO_CAP "oss"
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#include "audio_int.h"
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typedef struct OSSVoiceOut {
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HWVoiceOut hw;
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void *pcm_buf;
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int fd;
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int nfrags;
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int fragsize;
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int mmapped;
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int old_optr;
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} OSSVoiceOut;
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typedef struct OSSVoiceIn {
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HWVoiceIn hw;
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void *pcm_buf;
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int fd;
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int nfrags;
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int fragsize;
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int old_optr;
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} OSSVoiceIn;
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static struct {
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int try_mmap;
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int nfrags;
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int fragsize;
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const char *devpath_out;
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const char *devpath_in;
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int debug;
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} conf = {
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.try_mmap = 0,
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.nfrags = 4,
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.fragsize = 4096,
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.devpath_out = "/dev/dsp",
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.devpath_in = "/dev/dsp",
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.debug = 0
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};
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struct oss_params {
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int freq;
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audfmt_e fmt;
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int nchannels;
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int nfrags;
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int fragsize;
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};
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static void GCC_FMT_ATTR (2, 3) oss_logerr (int err, const char *fmt, ...)
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{
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va_list ap;
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va_start (ap, fmt);
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AUD_vlog (AUDIO_CAP, fmt, ap);
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va_end (ap);
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AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
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}
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static void GCC_FMT_ATTR (3, 4) oss_logerr2 (
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int err,
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const char *typ,
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const char *fmt,
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...
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)
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{
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va_list ap;
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AUD_log (AUDIO_CAP, "Could not initialize %s\n", typ);
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va_start (ap, fmt);
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AUD_vlog (AUDIO_CAP, fmt, ap);
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va_end (ap);
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AUD_log (AUDIO_CAP, "Reason: %s\n", strerror (err));
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}
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static void oss_anal_close (int *fdp)
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{
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int err = close (*fdp);
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if (err) {
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oss_logerr (errno, "Failed to close file(fd=%d)\n", *fdp);
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}
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*fdp = -1;
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}
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static int oss_write (SWVoiceOut *sw, void *buf, int len)
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{
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return audio_pcm_sw_write (sw, buf, len);
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}
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static int aud_to_ossfmt (audfmt_e fmt)
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{
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switch (fmt) {
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case AUD_FMT_S8:
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return AFMT_S8;
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case AUD_FMT_U8:
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return AFMT_U8;
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case AUD_FMT_S16:
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return AFMT_S16_LE;
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case AUD_FMT_U16:
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return AFMT_U16_LE;
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default:
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dolog ("Internal logic error: Bad audio format %d\n", fmt);
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#ifdef DEBUG_AUDIO
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abort ();
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#endif
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return AFMT_U8;
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}
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}
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static int oss_to_audfmt (int ossfmt, audfmt_e *fmt, int *endianness)
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{
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switch (ossfmt) {
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case AFMT_S8:
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*endianness = 0;
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*fmt = AUD_FMT_S8;
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break;
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case AFMT_U8:
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*endianness = 0;
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*fmt = AUD_FMT_U8;
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break;
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case AFMT_S16_LE:
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*endianness = 0;
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*fmt = AUD_FMT_S16;
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break;
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case AFMT_U16_LE:
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*endianness = 0;
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*fmt = AUD_FMT_U16;
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break;
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case AFMT_S16_BE:
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*endianness = 1;
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*fmt = AUD_FMT_S16;
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break;
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case AFMT_U16_BE:
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*endianness = 1;
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*fmt = AUD_FMT_U16;
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break;
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default:
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dolog ("Unrecognized audio format %d\n", ossfmt);
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return -1;
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}
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return 0;
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}
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#if defined DEBUG_MISMATCHES || defined DEBUG
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static void oss_dump_info (struct oss_params *req, struct oss_params *obt)
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{
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dolog ("parameter | requested value | obtained value\n");
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dolog ("format | %10d | %10d\n", req->fmt, obt->fmt);
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dolog ("channels | %10d | %10d\n",
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req->nchannels, obt->nchannels);
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dolog ("frequency | %10d | %10d\n", req->freq, obt->freq);
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dolog ("nfrags | %10d | %10d\n", req->nfrags, obt->nfrags);
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dolog ("fragsize | %10d | %10d\n",
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req->fragsize, obt->fragsize);
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}
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#endif
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static int oss_open (int in, struct oss_params *req,
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struct oss_params *obt, int *pfd)
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{
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int fd;
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int mmmmssss;
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audio_buf_info abinfo;
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int fmt, freq, nchannels;
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const char *dspname = in ? conf.devpath_in : conf.devpath_out;
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const char *typ = in ? "ADC" : "DAC";
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fd = open (dspname, (in ? O_RDONLY : O_WRONLY) | O_NONBLOCK);
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if (-1 == fd) {
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oss_logerr2 (errno, typ, "Failed to open `%s'\n", dspname);
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return -1;
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}
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freq = req->freq;
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nchannels = req->nchannels;
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fmt = req->fmt;
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if (ioctl (fd, SNDCTL_DSP_SAMPLESIZE, &fmt)) {
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oss_logerr2 (errno, typ, "Failed to set sample size %d\n", req->fmt);
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goto err;
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}
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if (ioctl (fd, SNDCTL_DSP_CHANNELS, &nchannels)) {
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oss_logerr2 (errno, typ, "Failed to set number of channels %d\n",
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req->nchannels);
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goto err;
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}
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if (ioctl (fd, SNDCTL_DSP_SPEED, &freq)) {
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oss_logerr2 (errno, typ, "Failed to set frequency %d\n", req->freq);
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goto err;
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}
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if (ioctl (fd, SNDCTL_DSP_NONBLOCK, NULL)) {
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oss_logerr2 (errno, typ, "Failed to set non-blocking mode\n");
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goto err;
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}
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mmmmssss = (req->nfrags << 16) | lsbindex (req->fragsize);
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if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
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oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
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req->nfrags, req->fragsize);
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goto err;
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}
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if (ioctl (fd, in ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &abinfo)) {
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oss_logerr2 (errno, typ, "Failed to get buffer length\n");
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goto err;
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}
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if (!abinfo.fragstotal || !abinfo.fragsize) {
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AUD_log (AUDIO_CAP, "Returned bogus buffer information(%d, %d) for %s\n",
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abinfo.fragstotal, abinfo.fragsize, typ);
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goto err;
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}
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obt->fmt = fmt;
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obt->nchannels = nchannels;
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obt->freq = freq;
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obt->nfrags = abinfo.fragstotal;
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obt->fragsize = abinfo.fragsize;
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*pfd = fd;
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#ifdef DEBUG_MISMATCHES
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if ((req->fmt != obt->fmt) ||
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(req->nchannels != obt->nchannels) ||
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(req->freq != obt->freq) ||
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(req->fragsize != obt->fragsize) ||
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(req->nfrags != obt->nfrags)) {
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dolog ("Audio parameters mismatch\n");
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oss_dump_info (req, obt);
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}
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#endif
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#ifdef DEBUG
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oss_dump_info (req, obt);
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#endif
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return 0;
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err:
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oss_anal_close (&fd);
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return -1;
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}
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static int oss_run_out (HWVoiceOut *hw)
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{
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OSSVoiceOut *oss = (OSSVoiceOut *) hw;
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int err, rpos, live, decr;
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int samples;
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uint8_t *dst;
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struct st_sample *src;
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struct audio_buf_info abinfo;
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struct count_info cntinfo;
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int bufsize;
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live = audio_pcm_hw_get_live_out (hw);
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if (!live) {
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return 0;
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}
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bufsize = hw->samples << hw->info.shift;
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if (oss->mmapped) {
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int bytes;
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err = ioctl (oss->fd, SNDCTL_DSP_GETOPTR, &cntinfo);
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if (err < 0) {
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oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
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return 0;
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}
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if (cntinfo.ptr == oss->old_optr) {
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if (abs (hw->samples - live) < 64) {
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dolog ("warning: Overrun\n");
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}
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return 0;
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}
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if (cntinfo.ptr > oss->old_optr) {
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bytes = cntinfo.ptr - oss->old_optr;
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}
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else {
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bytes = bufsize + cntinfo.ptr - oss->old_optr;
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}
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decr = audio_MIN (bytes >> hw->info.shift, live);
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}
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else {
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err = ioctl (oss->fd, SNDCTL_DSP_GETOSPACE, &abinfo);
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if (err < 0) {
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oss_logerr (errno, "SNDCTL_DSP_GETOPTR failed\n");
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return 0;
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}
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if (abinfo.bytes > bufsize) {
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if (conf.debug) {
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dolog ("warning: Invalid available size, size=%d bufsize=%d\n"
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"please report your OS/audio hw to malc@pulsesoft.com\n",
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abinfo.bytes, bufsize);
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}
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abinfo.bytes = bufsize;
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}
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if (abinfo.bytes < 0) {
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if (conf.debug) {
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dolog ("warning: Invalid available size, size=%d bufsize=%d\n",
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abinfo.bytes, bufsize);
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}
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return 0;
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}
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decr = audio_MIN (abinfo.bytes >> hw->info.shift, live);
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if (!decr) {
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return 0;
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}
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}
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samples = decr;
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rpos = hw->rpos;
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while (samples) {
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int left_till_end_samples = hw->samples - rpos;
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int convert_samples = audio_MIN (samples, left_till_end_samples);
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src = hw->mix_buf + rpos;
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dst = advance (oss->pcm_buf, rpos << hw->info.shift);
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hw->clip (dst, src, convert_samples);
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if (!oss->mmapped) {
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int written;
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written = write (oss->fd, dst, convert_samples << hw->info.shift);
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/* XXX: follow errno recommendations ? */
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if (written == -1) {
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oss_logerr (
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errno,
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"Failed to write %d bytes of audio data from %p\n",
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convert_samples << hw->info.shift,
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dst
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);
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continue;
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}
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if (written != convert_samples << hw->info.shift) {
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int wsamples = written >> hw->info.shift;
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int wbytes = wsamples << hw->info.shift;
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if (wbytes != written) {
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dolog ("warning: Misaligned write %d (requested %d), "
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"alignment %d\n",
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wbytes, written, hw->info.align + 1);
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}
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decr -= wsamples;
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rpos = (rpos + wsamples) % hw->samples;
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break;
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}
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}
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rpos = (rpos + convert_samples) % hw->samples;
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samples -= convert_samples;
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}
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if (oss->mmapped) {
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oss->old_optr = cntinfo.ptr;
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}
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hw->rpos = rpos;
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return decr;
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}
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static void oss_fini_out (HWVoiceOut *hw)
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{
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int err;
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OSSVoiceOut *oss = (OSSVoiceOut *) hw;
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ldebug ("oss_fini\n");
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oss_anal_close (&oss->fd);
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if (oss->pcm_buf) {
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if (oss->mmapped) {
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err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
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if (err) {
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oss_logerr (errno, "Failed to unmap buffer %p, size %d\n",
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oss->pcm_buf, hw->samples << hw->info.shift);
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}
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}
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else {
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qemu_free (oss->pcm_buf);
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}
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oss->pcm_buf = NULL;
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}
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}
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static int oss_init_out (HWVoiceOut *hw, struct audsettings *as)
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{
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OSSVoiceOut *oss = (OSSVoiceOut *) hw;
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struct oss_params req, obt;
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int endianness;
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int err;
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int fd;
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audfmt_e effective_fmt;
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struct audsettings obt_as;
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oss->fd = -1;
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req.fmt = aud_to_ossfmt (as->fmt);
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req.freq = as->freq;
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req.nchannels = as->nchannels;
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req.fragsize = conf.fragsize;
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req.nfrags = conf.nfrags;
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if (oss_open (0, &req, &obt, &fd)) {
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return -1;
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}
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err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
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if (err) {
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oss_anal_close (&fd);
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return -1;
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}
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obt_as.freq = obt.freq;
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obt_as.nchannels = obt.nchannels;
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obt_as.fmt = effective_fmt;
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obt_as.endianness = endianness;
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audio_pcm_init_info (&hw->info, &obt_as);
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oss->nfrags = obt.nfrags;
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oss->fragsize = obt.fragsize;
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if (obt.nfrags * obt.fragsize & hw->info.align) {
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dolog ("warning: Misaligned DAC buffer, size %d, alignment %d\n",
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obt.nfrags * obt.fragsize, hw->info.align + 1);
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}
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hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
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oss->mmapped = 0;
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if (conf.try_mmap) {
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oss->pcm_buf = mmap (
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0,
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hw->samples << hw->info.shift,
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PROT_READ | PROT_WRITE,
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MAP_SHARED,
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fd,
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0
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);
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if (oss->pcm_buf == MAP_FAILED) {
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oss_logerr (errno, "Failed to map %d bytes of DAC\n",
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hw->samples << hw->info.shift);
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} else {
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int err;
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int trig = 0;
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if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
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oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
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}
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else {
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trig = PCM_ENABLE_OUTPUT;
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if (ioctl (fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
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oss_logerr (
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errno,
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"SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
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);
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}
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else {
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oss->mmapped = 1;
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}
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}
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if (!oss->mmapped) {
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err = munmap (oss->pcm_buf, hw->samples << hw->info.shift);
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if (err) {
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oss_logerr (errno, "Failed to unmap buffer %p size %d\n",
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oss->pcm_buf, hw->samples << hw->info.shift);
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}
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}
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}
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}
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if (!oss->mmapped) {
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oss->pcm_buf = audio_calloc (
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AUDIO_FUNC,
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hw->samples,
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1 << hw->info.shift
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);
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if (!oss->pcm_buf) {
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dolog (
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"Could not allocate DAC buffer (%d samples, each %d bytes)\n",
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hw->samples,
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1 << hw->info.shift
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);
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oss_anal_close (&fd);
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return -1;
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}
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}
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oss->fd = fd;
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return 0;
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}
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static int oss_ctl_out (HWVoiceOut *hw, int cmd, ...)
|
|
{
|
|
int trig;
|
|
OSSVoiceOut *oss = (OSSVoiceOut *) hw;
|
|
|
|
if (!oss->mmapped) {
|
|
return 0;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case VOICE_ENABLE:
|
|
ldebug ("enabling voice\n");
|
|
audio_pcm_info_clear_buf (&hw->info, oss->pcm_buf, hw->samples);
|
|
trig = PCM_ENABLE_OUTPUT;
|
|
if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
|
|
oss_logerr (
|
|
errno,
|
|
"SNDCTL_DSP_SETTRIGGER PCM_ENABLE_OUTPUT failed\n"
|
|
);
|
|
return -1;
|
|
}
|
|
break;
|
|
|
|
case VOICE_DISABLE:
|
|
ldebug ("disabling voice\n");
|
|
trig = 0;
|
|
if (ioctl (oss->fd, SNDCTL_DSP_SETTRIGGER, &trig) < 0) {
|
|
oss_logerr (errno, "SNDCTL_DSP_SETTRIGGER 0 failed\n");
|
|
return -1;
|
|
}
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int oss_init_in (HWVoiceIn *hw, struct audsettings *as)
|
|
{
|
|
OSSVoiceIn *oss = (OSSVoiceIn *) hw;
|
|
struct oss_params req, obt;
|
|
int endianness;
|
|
int err;
|
|
int fd;
|
|
audfmt_e effective_fmt;
|
|
struct audsettings obt_as;
|
|
|
|
oss->fd = -1;
|
|
|
|
req.fmt = aud_to_ossfmt (as->fmt);
|
|
req.freq = as->freq;
|
|
req.nchannels = as->nchannels;
|
|
req.fragsize = conf.fragsize;
|
|
req.nfrags = conf.nfrags;
|
|
if (oss_open (1, &req, &obt, &fd)) {
|
|
return -1;
|
|
}
|
|
|
|
err = oss_to_audfmt (obt.fmt, &effective_fmt, &endianness);
|
|
if (err) {
|
|
oss_anal_close (&fd);
|
|
return -1;
|
|
}
|
|
|
|
obt_as.freq = obt.freq;
|
|
obt_as.nchannels = obt.nchannels;
|
|
obt_as.fmt = effective_fmt;
|
|
obt_as.endianness = endianness;
|
|
|
|
audio_pcm_init_info (&hw->info, &obt_as);
|
|
oss->nfrags = obt.nfrags;
|
|
oss->fragsize = obt.fragsize;
|
|
|
|
if (obt.nfrags * obt.fragsize & hw->info.align) {
|
|
dolog ("warning: Misaligned ADC buffer, size %d, alignment %d\n",
|
|
obt.nfrags * obt.fragsize, hw->info.align + 1);
|
|
}
|
|
|
|
hw->samples = (obt.nfrags * obt.fragsize) >> hw->info.shift;
|
|
oss->pcm_buf = audio_calloc (AUDIO_FUNC, hw->samples, 1 << hw->info.shift);
|
|
if (!oss->pcm_buf) {
|
|
dolog ("Could not allocate ADC buffer (%d samples, each %d bytes)\n",
|
|
hw->samples, 1 << hw->info.shift);
|
|
oss_anal_close (&fd);
|
|
return -1;
|
|
}
|
|
|
|
oss->fd = fd;
|
|
return 0;
|
|
}
|
|
|
|
static void oss_fini_in (HWVoiceIn *hw)
|
|
{
|
|
OSSVoiceIn *oss = (OSSVoiceIn *) hw;
|
|
|
|
oss_anal_close (&oss->fd);
|
|
|
|
if (oss->pcm_buf) {
|
|
qemu_free (oss->pcm_buf);
|
|
oss->pcm_buf = NULL;
|
|
}
|
|
}
|
|
|
|
static int oss_run_in (HWVoiceIn *hw)
|
|
{
|
|
OSSVoiceIn *oss = (OSSVoiceIn *) hw;
|
|
int hwshift = hw->info.shift;
|
|
int i;
|
|
int live = audio_pcm_hw_get_live_in (hw);
|
|
int dead = hw->samples - live;
|
|
size_t read_samples = 0;
|
|
struct {
|
|
int add;
|
|
int len;
|
|
} bufs[2] = {
|
|
{ hw->wpos, 0 },
|
|
{ 0, 0 }
|
|
};
|
|
|
|
if (!dead) {
|
|
return 0;
|
|
}
|
|
|
|
if (hw->wpos + dead > hw->samples) {
|
|
bufs[0].len = (hw->samples - hw->wpos) << hwshift;
|
|
bufs[1].len = (dead - (hw->samples - hw->wpos)) << hwshift;
|
|
}
|
|
else {
|
|
bufs[0].len = dead << hwshift;
|
|
}
|
|
|
|
|
|
for (i = 0; i < 2; ++i) {
|
|
ssize_t nread;
|
|
|
|
if (bufs[i].len) {
|
|
void *p = advance (oss->pcm_buf, bufs[i].add << hwshift);
|
|
nread = read (oss->fd, p, bufs[i].len);
|
|
|
|
if (nread > 0) {
|
|
if (nread & hw->info.align) {
|
|
dolog ("warning: Misaligned read %zd (requested %d), "
|
|
"alignment %d\n", nread, bufs[i].add << hwshift,
|
|
hw->info.align + 1);
|
|
}
|
|
read_samples += nread >> hwshift;
|
|
hw->conv (hw->conv_buf + bufs[i].add, p, nread >> hwshift,
|
|
&nominal_volume);
|
|
}
|
|
|
|
if (bufs[i].len - nread) {
|
|
if (nread == -1) {
|
|
switch (errno) {
|
|
case EINTR:
|
|
case EAGAIN:
|
|
break;
|
|
default:
|
|
oss_logerr (
|
|
errno,
|
|
"Failed to read %d bytes of audio (to %p)\n",
|
|
bufs[i].len, p
|
|
);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
hw->wpos = (hw->wpos + read_samples) % hw->samples;
|
|
return read_samples;
|
|
}
|
|
|
|
static int oss_read (SWVoiceIn *sw, void *buf, int size)
|
|
{
|
|
return audio_pcm_sw_read (sw, buf, size);
|
|
}
|
|
|
|
static int oss_ctl_in (HWVoiceIn *hw, int cmd, ...)
|
|
{
|
|
(void) hw;
|
|
(void) cmd;
|
|
return 0;
|
|
}
|
|
|
|
static void *oss_audio_init (void)
|
|
{
|
|
return &conf;
|
|
}
|
|
|
|
static void oss_audio_fini (void *opaque)
|
|
{
|
|
(void) opaque;
|
|
}
|
|
|
|
static struct audio_option oss_options[] = {
|
|
{"FRAGSIZE", AUD_OPT_INT, &conf.fragsize,
|
|
"Fragment size in bytes", NULL, 0},
|
|
{"NFRAGS", AUD_OPT_INT, &conf.nfrags,
|
|
"Number of fragments", NULL, 0},
|
|
{"MMAP", AUD_OPT_BOOL, &conf.try_mmap,
|
|
"Try using memory mapped access", NULL, 0},
|
|
{"DAC_DEV", AUD_OPT_STR, &conf.devpath_out,
|
|
"Path to DAC device", NULL, 0},
|
|
{"ADC_DEV", AUD_OPT_STR, &conf.devpath_in,
|
|
"Path to ADC device", NULL, 0},
|
|
{"DEBUG", AUD_OPT_BOOL, &conf.debug,
|
|
"Turn on some debugging messages", NULL, 0},
|
|
{NULL, 0, NULL, NULL, NULL, 0}
|
|
};
|
|
|
|
static struct audio_pcm_ops oss_pcm_ops = {
|
|
oss_init_out,
|
|
oss_fini_out,
|
|
oss_run_out,
|
|
oss_write,
|
|
oss_ctl_out,
|
|
|
|
oss_init_in,
|
|
oss_fini_in,
|
|
oss_run_in,
|
|
oss_read,
|
|
oss_ctl_in
|
|
};
|
|
|
|
struct audio_driver oss_audio_driver = {
|
|
INIT_FIELD (name = ) "oss",
|
|
INIT_FIELD (descr = ) "OSS http://www.opensound.com",
|
|
INIT_FIELD (options = ) oss_options,
|
|
INIT_FIELD (init = ) oss_audio_init,
|
|
INIT_FIELD (fini = ) oss_audio_fini,
|
|
INIT_FIELD (pcm_ops = ) &oss_pcm_ops,
|
|
INIT_FIELD (can_be_default = ) 1,
|
|
INIT_FIELD (max_voices_out = ) INT_MAX,
|
|
INIT_FIELD (max_voices_in = ) INT_MAX,
|
|
INIT_FIELD (voice_size_out = ) sizeof (OSSVoiceOut),
|
|
INIT_FIELD (voice_size_in = ) sizeof (OSSVoiceIn)
|
|
};
|